GMPP Auctions First LSX454R for Charity

 Place your bids on the most powerful motor ever built by GMPP

GM Performance Parts (GMPP) will auction the first production LSX454R crate engine at the Barrett-Jackson Scottsdale event this month, with the proceeds going to the American Heart Association. Just check out the specs on this historically powerful engine:

HP: 720+ at 6,000rpm

TQ: 720+ at 4,500rpm

Bore: 4.185”
Stroke: 4.125”
Cubic inches: 454
Compression ratio: 13.1:1
Heads: Drag race cylinder heads (6 bolt LSX aluminum) (bare head part number 19166979)
Flow: Intake- 435 CFM at 0.800” lift at 28” water pressure; Exhaust- 252 CFM at 0.800” lift at 28” water pressure
Valves: One piece stainless steel, Intake- 2.25” X 6.350” with 50 degree seat; Exhaust- 1.625” X 6.350” with 50 degree seat
Combustion chamber: 50 cc fully CNC’ed
Runners: Fully CNC intake 313 cc and CNC 116 cc exhaust runners
Rocker arms: Shaft mounted rocker arms with needle bearing fulcrum and tip
1.9:1 rocker ratio (part number 19201808)
Lifters: Tie bar style mechanical roller lifters
Cam shaft: Hard ground steel mechanical roller camshaft, Intake/exhaust lift- 0.738”,
Duration at 0.050” lift- 250/270 degrees, Lobe separation angle- 108
Pistons: Forged 4032 aluminum with skirt coating 4.180” diameter with 0.866” steel wrist pin (part number 19166958, includes rings and wrist pin)
Ring pack: Top ring- steel with plasma face 1.2mm, Second ring- cast iron 1.2mm
Oil ring- 11 lb, 2.0 mm
Crankshaft: Forged 4340 steel 2.560” main journals, 2.100” connecting rod journal, uses 8 bolt flexplate/flywheel attachment (part number 19244018)
Rods: Forged 4340 steel I-beam, 6.000” center to center, 2.100” big end, 0.866” wrist pin (part number 19166964)
Bearings: Mains -Clevite MS-2199H, Rods- Clevite CB-663H
Harmonic Balancer: ATI –SFI approved
Block: LSX cast iron with 6 bolt cylinder head attachment (part number 19244057)
Intake manifold: Large plenum aluminum with 4500 series carburetor flange, cast in bosses for dual stage nitrous oxide (part number 19257851)
Carburetor: 4500 series Holley 1150 CFM
Fuel: Race fuel (110 octane minimum)